The rent vs buy debate has raged for decades, and the answer has always been 'it depends.' What it depends on — mortgage rates, home appreciation, opportunity cost of down payment, transaction costs, and length of stay — can now be modeled precisely. This calculator does that math so you don't have to guess. The answer is often surprising: in expensive coastal cities, renting frequently wins over 10-year horizons; in mid-America, buying wins after just 4–5 years.

Transaction costs are the killer of short-term buying. Closing costs of 3% to buy plus 6% commission to sell mean you need 9% appreciation just to break even before considering interest, taxes, and maintenance. At 4% annual appreciation, that's 2.5 years of pure appreciation to cover transaction costs alone. Under 5 years of ownership, renting almost always wins financially in most US markets.

The price-to-rent ratio is the quickest sanity check. Divide home price by annual rent. Under 15 means buying is strongly favored. 15–20 is neutral territory. Over 20 means renting is financially favored, and your invested down payment likely outperforms home appreciation. Manhattan often exceeds 30 (rent!). San Francisco and Seattle exceed 25. Pittsburgh and Cleveland are under 12 (buy!). Know your local ratio before assuming buying is 'always' smart.

'Throwing money away on rent' is one of the great financial misconceptions. In year one of a 30-year mortgage at 7%, roughly 70% of your monthly payment is interest — which is also 'thrown away' to the bank. Add property tax, insurance, maintenance, and HOA fees, and the amount 'building equity' in year one is often just 15–20% of the mortgage payment. Renting isn't stupid; renting forever without investing the difference is.

Opportunity cost of down payment is the calculator's most important variable. A $60,000 down payment invested in an index fund at 8% average return becomes $130,000 in 10 years. Renters who invest the difference between rent and mortgage often end up wealthier than buyers in high-cost cities. Buyers win in cheaper markets with fast appreciation. The math shifts constantly based on interest rates, market performance, and your specific city.

Hidden costs of ownership are enormous. Maintenance runs 1–2% of home value annually — on a $400,000 home, that's $4,000–$8,000/year. Major repairs (HVAC replacement, roof, foundation) hit unpredictably at $5,000–$30,000. Property tax escalates. Insurance rises after every disaster. HOA fees only ever go up. Owning is a job, not a passive investment — factor in the hours and stress alongside the dollars.

The 'right' answer is deeply personal. If you'll stay 5+ years, want to customize your space, and value stability over flexibility, buy. If you're in a job that might relocate, live in an expensive coastal market, or prefer investing in index funds over shingles, rent. Use this calculator to model your specific numbers — city, rent, home price, stay length, and appreciation assumptions — and see the break-even year in your scenario. Combine with our House Affordability Calculator to verify you're comparing to a house you should actually buy.